IMPORTANT UPDATE

Due to changes in the RN171 module, we can no longer provide support for this code.

Ubidots-Arduino-WiFly

Ubidots-Arduino-WiFly provides an example of sending data to Ubidots from the WiFly shield, which uses the RN171 chip from Microchip Technologies.

Components

• Arduino uno
• WiFly shield RN171
• This WiFly library

A Quick example

Here's a quick example of how to post an analogue value to Ubidots.

 /*
 Basic sketch for WiFly shield RN171

 This is a basic example to post a value to Ubidots using the function "save_value".

 You'll need:
 * An Arduino Uno
 * A WiFly Shield RN171

 Pins' connection
 Arduino       WiFly
  2    <---->    TX
  3    <---->    RX

 Created 20 Aug. 2014
 by Mateo Velez - Metavix

 This example code is in the public domain.

 */
//-------------------------------------------------------------
//------------------------------Libraries-----------------------
//-------------------------------------------------------------

#include <Arduino.h>
#include <SoftwareSerial.h>
#include <WiFly.h>

//-------------------------------------------------------------
//---------------------Network Configuration-------------------
//-------------------------------------------------------------

/* Change the AUTH according to your network settings
   If is open change to WIFLY_AUTH_OPEN
   If is WPA1 change to WIFLY_AUTH_WPA1
   If is WPA1_2 change to WIFLY_AUTH_WPA1
   If is WPA2 change to WIFLY_AUTH_WPA1
*/
#define SSID      "Atom$House$Medellin"
#define KEY       "atommed2014"
#define AUTH      WIFLY_AUTH_WPA2_PSK

SoftwareSerial uart(2, 3);
WiFly wifly(uart);
unsigned long start_millis = 0;

void setup() {
  Serial.begin(9600);
  Serial.println("------- WIFLY HTTP --------");

  uart.begin(9600);
  if (!wifly.isAssociated(SSID)) {
  while (!wifly.join(SSID, KEY, AUTH))
  {
      Serial.println("Failed to join " SSID);
      Serial.println("Wait 0.1 second and try again...");
      delay(100);
   }
    wifly.save();
  }
}


void loop() {
  int reset = 0;

  int valor = analogRead(A0);
  while ((save_value(valor)) < 0)
  {
    reset++;
    if(reset == 10)
    {
      asm volatile ("  jmp 0");
    }
  }

//   Uncomment for debug

//  char r;
//  while (wifly.receive((uint8_t *)&r, 1, 1000) == 1)
//  {
//    Serial.print(r);
//  }
}
int save_value(int dato)
{
  char post_data_buf[32];
  snprintf(post_data_buf, sizeof(post_data_buf), "{\"value\": %d}\r\n", dato);

  char host[20];
  uint16_t port;


  if (!wifly.connect("things.ubidots.com", 80)) {
    Serial.println("Failed to connect.\r\n");
    return -2;
  }

  // Send request
  char buf[200];
  //dont forget change your id and your token
  snprintf(buf, sizeof(buf), "POST /api/v1.6/variables/53beeca07625420bde83ce29/values HTTP/1.1\r\nContent-Type: application/json\r\nContent-Length: %d\r\nX-Auth-Token: CCN8FrVulRYGulPTkbaiR9Myx8qN2o\r\nHost: things.ubidots.com\r\n\r\n",strlen(post_data_buf));
  wifly.send(buf);

  // Send body
  if (post_data_buf != NULL) {
    wifly.send(post_data_buf);
  }
   wifly.send("\r\n");
  return 0;
}

Explanation of the functions

save_value()

boolean = ubiclient.save_value(value)

Saves a value to Ubidots. Returns true upon success. Returns false upon error.